The structure of an alcohol of given molecular formula C 4 H 10 O to be predicted using 13 CNMR spectra. Concept introduction: The 13 CNMR spectrum gives information on the different electronic environments of carbon. As like 1 HNMR, the number of signals generated in 13 CNMR are predicted by performing symmetry operations (rotation or reflection symmetry). Only chemical shift values are reported in the spectrum but not the multiplicity and integration values because the coupling between two neighboring 13 C- 13 C nuclei are weakly involved due to the low abundance of 13 C isotopes of carbon atom. To Identify: The structure of an alcohol of given molecular formula C 8 H 16 O. Broadband-decoupled 13 CNMR spectrum: The spectra provide information regarding the total number of carbon environments. DEPT (Distortionless enhancement by polarization transfer): a) DEPT-90: The spectrum exhibits signal only from CH group and no signals from CH 3 , CH 2 , CH and quaternary carbon (carbon with no protons). b) DEPT-135: The spectrum exhibits CH 3 groups and CH groups as positive signals (pointing up); CH 2 groups appear as negative signals (pointing down) and quaternary carbon does not appear. The signals appear in each type of spectrum:

Question

In the phase diagram of steel (two components Fe and C), region A is the gamma austenite solid and region B contains the gamma solid and liquid. Indicate the degrees of freedom that the fields A and B have,

Answer 1

Question

Chapter 13.12, Problem 20P

Interpretation Introduction

Interpretation:

The structure of an alcohol of given molecular formula C₄H₁₀O to be predicted using ¹³CNMR spectra.

Concept introduction:

The ¹³CNMR spectrum gives information on the different electronic environments of carbon. As like ¹HNMR, the number of signals generated in ¹³CNMR are predicted by performing symmetry operations (rotation or reflection symmetry). Only chemical shift values are reported in the spectrum but not the multiplicity and integration values because the coupling between two neighboring ¹³C-¹³ C nuclei are weakly involved due to the low abundance of ¹³C isotopes of carbon atom.

To Identify:

The structure of an alcohol of given molecular formula C₈H₁₆O.

Broadband-decoupled ¹³CNMR spectrum:

The spectra provide information regarding the total number of carbon environments.

DEPT (Distortionless enhancement by polarization transfer):

a) DEPT-90: The spectrum exhibits signal only from CH group and no signals from CH₃, CH₂, CH and quaternary carbon (carbon with no protons).

b) DEPT-135: The spectrum exhibits CH₃ groups and CH groups as positive signals (pointing up); CH₂ groups appear as negative signals (pointing down) and quaternary carbon does not appear.

The signals appear in each type of spectrum:

Expert Solution & Answer

Trending nowThis is a popular solution!

See solution

Check out sample textbook solution

Students have asked these similar questions

In the phase diagram of steel (two components Fe and C), region A is the gamma austenite solid and region B contains the gamma solid and liquid. Indicate the degrees of freedom that the fields A and B have,

For a condensed binary system in equilibrium at constant pressure, indicate the maximum number of phases that can exist.

Part V. Label ad match the carbons in compounds Jane and Diane w/ the corresponding peak no. in the Spectra (Note: use the given peak no. To label the carbons, other peak no are intentionally omitted) 7 4 2 -0.13 -0.12 -0.11 -0.10 -0.08 8 CI Jane 1 -0.09 5 210 200 190 180 170 160 150 140 130 120 110 100 -8 90 f1 (ppm) 11 8 172.4 172.0 f1 (ppr HO CI NH Diane 7 3 11 80 80 -80 -R 70 60 60 2 5 -8 50 40 8. 170 160 150 140 130 120 110 100 90 -0 80 70 20 f1 (ppm) 15 30 -20 20 -60 60 -0.07 -0.06 -0.05 -0.04 -0.03 -0.02 -0.01 -0.00 -0.01 10 -0.17 16 15 56 16 -0.16 -0.15 -0.14 -0.13 -0.12 -0.11 -0.10 -0.09 -0.08 -0.07 -0.06 -0.05 -0.04 17.8 17.6 17.4 17.2 17.0 f1 (ppm) -0.03 -0.02 550 106 40 30 20 20 -0.01 -0.00 F-0.01 10 0